Replace that rusty metal with these exact reproductions of the Ford factory stampings. Mustangs with the dual exhaust package had these reinforcement plates installed by the factory to support the muffler hangers. Without these supports installed, the stock factory floor pan could suffer metal fatigue from the weight of the dual exhaust system. Classic Tube's reinforcement plates are made using the same gauge metal as the factory originals and the plates are pre-drilled for the hanger stud brackets.